856285230977 has 4 divisors (see below), whose sum is σ = 934129342896. Its totient is φ = 778441119060.

The previous prime is 856285230971. The next prime is 856285231031. The reversal of 856285230977 is 779032582658.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 856285230977 - 2⁴ = 856285230961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (856285230971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38922055943 + ... + 38922055964.

It is an arithmetic number, because the mean of its divisors is an integer number (233532335724).

Almost surely, 2^856285230977 is an apocalyptic number.

It is an amenable number.

856285230977 is a deficient number, since it is larger than the sum of its proper divisors (77844111919).

856285230977 is a wasteful number, since it uses less digits than its factorization.

856285230977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77844111918.

The product of its (nonzero) digits is 50803200, while the sum is 62.

The spelling of 856285230977 in words is "eight hundred fifty-six billion, two hundred eighty-five million, two hundred thirty thousand, nine hundred seventy-seven".